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barcode

a line of printed stripes of different thickness representing a numeric code which can be read electronically

COMMENT: Barcodes are found on most goods and their packages. The width and position of the stripes is sensed by a light pen or optical wand and provides information about the goods, such as price, stock quantity, etc. The main type of barcode used in Europe is the European Article Number (EAN) or the Universal Product Code (UPC). Barcodes are used on the backs of books, giving their ISBN number, and so helping the computerised stock control in bookshops.

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bar graph		barcode reader

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